package com.zy.core.utils.station.model;

import lombok.Getter;
import lombok.Setter;

import java.util.HashMap;
import java.util.Map;

@Getter
public class LoadGuardState {
    @Setter
    private int totalStationCount = 0;
    @Setter
    private int projectedTaskStationCount = 0;
    private final Map<Integer, Integer> stationLoopNoMap = new HashMap<>();

    public double currentLoad() {
        return calcLoad(this.projectedTaskStationCount, this.totalStationCount);
    }

    public double loadAfterReserve() {
        return calcLoad(this.projectedTaskStationCount + 1, this.totalStationCount);
    }

    public void reserveLoopTask(Integer loopNo) {
        if (loopNo == null || loopNo <= 0 || this.totalStationCount <= 0) {
            return;
        }
        this.projectedTaskStationCount++;
    }

    public void putStationLoopNo(Integer stationId, Integer loopNo) {
        if (stationId == null || loopNo == null) {
            return;
        }
        this.stationLoopNoMap.put(stationId, loopNo);
    }

    private double calcLoad(int taskCount, int stationCount) {
        if (stationCount <= 0 || taskCount <= 0) {
            return 0.0;
        }
        double load = (double) taskCount / (double) stationCount;
        if (load < 0.0) {
            return 0.0;
        }
        if (load > 1.0) {
            return 1.0;
        }
        return load;
    }
}